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How many hours your inverter can load?

The loading time is not depends on inverter.
The Use time depends on the size of the battery capacity .
There is a formula:
 Hours = battery capacity X battery voltage X 0.8X0.9 / load power 
 For example: a 12V 100AH batteryload a 220V 100W lights
Working time = 12 (V) X100 (AH) X0.8X0.9 / 100 (W) = 8.6 (h)
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